Buoyant exercise barbell



FIG. 1 is a front elevational view of the buoyant exercise barbell showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a cross-sectional view thereof taken along 5--5 of FIG. 3; and,

FIG. 6 is a perspective view thereof.

The broken portions of FIG. 5 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a buoyant exercise barbell, as shown and described. 